Are you with Leibniz or Cicero?

[abaris]

Would you necessarily have the same mindset if everything around you played out exactly the same? How much spontaneity is there in the world to allow that your circumstances could be drastically altered if the state at, say, birth, were largely or even precisely the same?

How would I even know if I hadn't knowledge of my previous existence? And how would you know that there isn't sufficient spontaneity in the world?